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Painter's Creek Development 2 December 9, 1983 <br /> tion with the site planner and the Univer ity of Minnesota soil consultant, <br />. James L. Anderson, it was concluded that drainfield system consisting of <br /> shallow trenches would be preferred for t ese lots. In order for thia <br /> system to be effective, the seasonal grou dwater table (as determinPd by <br /> ' soil mottling) must be below a depth o� 4 ft. and tE�e soil at the plan <br /> deptti of the shallow trenches must have a percolation rate faster than <br /> 60 minutes per inch. I <br /> CONCLUSION <br /> In the majority of the originally� pr posed drainfield areas, the <br /> seasonal groundwater table was encountere at a 4 ft. to 6 ft. depth. <br /> Fiowever, in 8 of the areas, the seasonal roundwater table was higher than <br /> a 4 ft. depth, and the site planner de id d to relocate these drainfield <br /> areas to more feasible areas. The new ar as were examined and tested with <br /> satisfactory results. <br /> With the exception of the alternate rainfields on Lots 16 and 20, the <br /> soils in the remaining proposed drainfiel areas had an average percolation <br /> rate of 60 or less. The test resu�ts ind ate the shallow trench drainfield <br /> system would be feasible at this site in n arly all of the tested areas. In <br /> the alternate drainfields on Lots 16 and 2 , "mound" systems were recommended. <br /> Please refer to the Test Summary Sheet for more specific information. <br /> TEST PROC�DUR <br /> Location <br /> Staking was provided by the site planler to define the primary drainfield <br /> area ("A") and the alternate drainfield ar as ("B") . The soil profile <br />